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https://www.readbyqxmd.com/read/29156284/temporal-characterization-and-statistical-analysis-of-flowback-and-produced-waters-and-their-potential-for-reuse
#1
Karl Oetjen, Kevin E Chan, Kristoffer Gulmark, Jan H Christensen, Jens Blotevogel, Thomas Borch, John R Spear, Tzahi Y Cath, Christopher P Higgins
Hydraulic fracturing (HF) has allowed for the utilization of previously unattainable shale oil and gas (O&G) resources. After HF is complete, the waters used to increase the facies' permeability return uphole as wastewaters. When these waters return to the surface, they are characterized by complex organic and inorganic chemistry, and can pose a health risk if not handled correctly. Therefore, these waters must be treated or disposed of properly. However, the variability of these waters' chemical composition over time is poorly understood and likely limits the applicability of their reuse...
November 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29154152/a-mathematical-model-to-plan-for-long-term-effects-of-water-conservation-choices-on-dry-weather-wastewater-flows-and-concentrations
#2
Lauren M Cook, Constantine Samaras, Jeanne M VanBriesen
In many cities, sewer systems are experiencing conditions that are significantly different from those for which they were designed. Factors such as water conservation efforts, changes in population, and efforts to reduce infiltration are altering the quantity and quality of sewage. These changes may affect the ability of sewers to maintain self-cleansing velocities, which are crucial to avoiding solids settling and corrosion issues. Further, such changes may alter the timeline for expected wastewater plant expansion...
November 15, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29154093/highly-selective-and-efficient-adsorption-of-hg-2-by-a-recyclable-aminophosphonic-acid-functionalized-polyacrylonitrile-fiber
#3
Gang Xu, Lu Wang, Yujia Xie, Minli Tao, Wenqin Zhang
Mercury ions, even an ultra-trace amount in water, present a serious environmental concern. Hence, searching for cost-effective and high-performance Hg(2+) adsorbents has acquired increasingly attention but still remained challenging. In this work, aminophosphonic acid was immobilized onto polyacrylonitrile fiber by chemical grafting approaches. The functionalized fiber (PANAPF) possessed high adsorption selectivity and efficiency for Hg(2+) when compared with other coexisting ions viz. Pb(2+), Cd(2+), Ag(+), Zn(2+), Cu(2+), Ni(2+), Co(2+), Ca(2+) and Mg(2+)...
November 11, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29154007/public-responses-to-water-reuse-understanding-the-evidence
#4
REVIEW
H M Smith, S Brouwer, P Jeffrey, J Frijns
Over the years, much research has attempted to unpack what drives public responses to water reuse, using a variety of approaches. A large amount of this work was captured by an initial review that covered research undertaken up to the early 2000s (Hartley, 2006). This paper showcases post-millennium evidence and thinking around public responses to water reuse, and highlights the novel insights and shifts in emphasis that have occurred in the field. Our analysis is structured around four broad, and highly interrelated, strands of thinking: 1) work focused on identifying the range of factors that influence public reactions to the concept of water reuse, and broadly looking for associations between different factors; 2) more specific approaches rooted in the socio-psychological modelling techniques; 3) work with a particular focus on understanding the influences of trust, risk perceptions and affective (emotional) reactions; and 4) work utilising social constructivist perspectives and socio-technical systems theory to frame responses to water reuse...
November 15, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29153875/the-role-of-operating-parameters-and-oxidative-damage-mechanisms-of-advanced-chemical-oxidation-processes-in-the-combat-against-antibiotic-resistant-bacteria-and-resistance-genes-present-in-urban-wastewater
#5
REVIEW
I Michael-Kordatou, P Karaolia, D Fatta-Kassinos
An upsurge in the study of antibiotic resistance in the environment has been observed in the last decade. Nowadays, it is becoming increasingly clear that urban wastewater is a key source of antibiotic resistance determinants, i.e. antibiotic-resistant bacteria and antibiotic resistance genes (ARB&ARGs). Urban wastewater reuse has arisen as an important component of water resources management in the European Union and worldwide to address prolonged water scarcity issues. Especially, biological wastewater treatment processes (i...
October 27, 2017: Water Research
https://www.readbyqxmd.com/read/29152571/structural-water-as-an-essential-comonomer-in-supramolecular-polymerization
#6
Shengyi Dong, Jing Leng, Yexin Feng, Ming Liu, Chloe J Stackhouse, Andreas Schönhals, Leonardo Chiappisi, Lingyan Gao, Wei Chen, Jie Shang, Lin Jin, Zhenhui Qi, Christoph A Schalley
Although the concept of structural water that is bound inside hydrophobic pockets and helps to stabilize protein structures is well established, water has rarely found a similar role in supramolecular polymers. Water is often used as a solvent for supramolecular polymerization, however without taking the role of a comonomer for the supramolecular polymer structure. We report a low-molecular weight monomer whose supramolecular polymerization is triggered by the incorporation of water. The presence of water molecules as comonomers is essential to the polymerization process...
November 2017: Science Advances
https://www.readbyqxmd.com/read/29148733/fluorescence-and-quenching-assessment-eem-parafac-of-de-facto-potable-reuse-in-the-neuse-river-north-carolina-united-states
#7
Martha J M Wells, Gene A Mullins, Katherine Y Bell, Allegra K Da Silva, Eileen M Navarrete
The Neuse River, North Carolina, U.S., exemplifies a typical de facto potable reuse scenario, where drinking water sources are located downstream of treated wastewater effluent discharges. The study results imply that planned potable water reuse, whether in an indirect or direct potable reuse scenario, might provide better control over water quality than the status quo conditions. Using fluorescence excitation-emission matrix (EEM) measurements, anthropogenic influence of a wastewater treatment plant (WWTP) discharge was observed in samples near the location of drinking water treatment plant (WTP) intakes, eight or more miles downstream of the WWTP, implying that anthropogenic compounds were not fully removed or degraded by natural processes in this reach of the river...
November 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29148024/blue-planet-dialysis-novel-water-sparing-strategies-for-reducing-dialysate-flow
#8
Alejandra Molano-Triviño, Benjamin Wancjer, Mauro M Neri, Akash N Karopadi, Mitchell Rosner, Claudio Ronco
INTRODUCTION: Hemodialysis (HD) is an expensive therapy in economic and in ecological terms, owing to a high carbon footprint and significant consumption of natural sources, especially water. Our aim was to review strategies to diminish waste of water in maintenance dialysis, exploring previously described water reuse trends and less known strategies for reducing the dialysate flow. METHODS: We conducted a systematic review of water-sparing strategies, including the reuse of reverse osmosis rejected water and the reduction of dialysate flux...
November 8, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/29147552/peptide-based-ambidextrous-bifunctional-gelator-applications-in-oil-spill-recovery-and-removal-of-toxic-organic-dyes-for-waste-water-management
#9
Kingshuk Basu, Nibedita Nandi, Biplab Mondal, Ashkan Dehsorkhi, Ian W Hamley, Arindam Banerjee
A low molecular weight peptide-based ambidextrous gelator molecule has been discovered for efficient control of water pollution. The gelator molecules can gel various organic solvents with diverse polarity, e.g. n-hexane, n-octane, petroleum ether, petrol, diesel, aromatic solvents like chlorobenzene, toluene, benzene, o-xylene and even aqueous phosphate buffer of pH 7.5. These gels have been thoroughly characterized using various techniques including field emission scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray powder diffraction analysis, small angle X-ray scattering and rheological experiments...
December 6, 2017: Interface Focus
https://www.readbyqxmd.com/read/29145090/comparative-study-of-dissolved-organic-matter-generated-from-activated-sludge-during-exposure-to-hypochlorite-hydrogen-peroxide-acid-and-alkaline-implications-for-on-line-chemical-cleaning-of-mbr
#10
Weiwei Cai, Yu Liu
Although on-line chemical cleaning has been extensively employed for maintaining the MBR permeability, little attention has been given to the negative impacts of such prevalent membrane cleaning practice. This study thus comparatively investigated the potential release of dissolved organic matter (DOM) from activated sludge upon the exposure to different kinds of frequently-used cleaning reagents, i.e. NaClO, H2O2, HCl and NaOH. It was found that NaClO at 50 and 80 mg L(-1) triggered significant release of DOM, while NaOH strongly promoted soluble nitrogen release...
November 8, 2017: Chemosphere
https://www.readbyqxmd.com/read/29144303/zero-valent-aluminum-mediated-degradation-of-bisphenol-a-in-the-presence-of-common-oxidants
#11
I Arslan-Alaton, T Olmez-Hanci, M Dogan, T Ozturk
The use of a commercial, nano-scale zero-valent aluminum (ZVA) powder was explored for the treatment of aqueous Bisphenol A (BPA). The study focused on the (i) activation of hydrogen peroxide (HP) and persulfate (PS) oxidants with ZVA to accelerate BPA degradation, (ii) comparison of the treatment performance in pure and real surface water (SW) samples, (iii) effects on toxicity and (iv) reuse potential of ZVA nanoparticles after ZVA/HP and ZVA/PS treatments. In pure water, ZVA coupled with HP or PS provided an effective means of BPA treatment particularly when PS was employed as the oxidant...
November 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29136533/removal-of-phosphate-from-water-by-amine-functionalized-copper-ferrite-chelated-with-la-iii
#12
Wei Gu, Xiaodi Li, Mingchao Xing, Wenkan Fang, Deyi Wu
Eutrophication has become a worldwide environmental problem and removing phosphorus from water/wastewater before discharge is essential. The purpose of our present study was to develop an efficient material in terms of both phosphate adsorption capacity and magnetic separability. To this end, we first compared the performances of four spinel ferrites, including magnesium, zinc, nickel and copper ferrites. Then we developed a copper ferrite-based novel magnetic adsorbent, by synthesizing 1,6-hexamethylenediamine-functionalized copper ferrite(CuFe2O4) via a single solvothermal synthesis process followed by LaCl3 treatment...
November 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29135240/an-osmotic-membrane-bioreactor-membrane-distillation-system-for-simultaneous-wastewater-reuse-and-seawater-desalination-performance-and-implications
#13
Wenhai Luo, Hop V Phan, Guo Xue Li, Faisal I Hai, William Evan Price, Menachem Elimelech, Long D Nghiem
In this study, we demonstrate the potential of an osmotic membrane bioreactor (OMBR) - membrane distillation (MD) hybrid system for simultaneous wastewater reuse and seawater desalination. A stable OMBR water flux of approximately 6 L m-2 h-1 was achieved when using MD to regenerate the seawater draw solution. Water production by the MD process was higher than that from OMBR to desalinate additional seawater and thus account for draw solute loss due to the reverse salt flux. Amplicon sequencing on the Miseq Illumina platform evidenced bacterial acclimatization to salinity build-up in the bioreactor, though there was a reduction in the bacterial community diversity...
November 14, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29129431/ultra-rapid-catalytic-degradation-of-4-nitrophenol-with-ionic-liquid-recoverable-and-reusable-ibuprofen-derived-silver-nanoparticles
#14
Syeda Sara Hassan, Krista Carlson, Swomitra Kumar Mohanty, Sirajuddin, Ali Canlier
This study reports a one-pot and eco-friendly method for the synthesis of spherical ibuprofen derived silver nanoparticles (IBU-AgNPs) in aqueous media using ibuprofen analgesics drug as capping as well as reducing agent. Formation of AgNPs occurred within a few min (less than 5 min) at room temperature without resorting to any harsh conditions and hazardous organic solvents. Synthesized AgNPs were characterized with common analytical techniques. Transmission electron microscope (TEM) images confirmed the formation of spherical particles having a size distribution in the range of 12...
November 9, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29127921/greywater-characterization-and-generation-rates-in-a-peri-urban-municipality-of-a-developing-country
#15
M Oteng-Peprah, N K de Vries, M A Acheampong
The quantity and quality of combined greywater from houses with in-house water supply and houses that rely on external sources of a peri-urban area in a developing country were determined. Data for quantity of greywater was collected from 36 households while 180 samples of greywater were collected from 60 households between December 2016 and February 2017. The results indicate that, average water consumption from households with in-house access was 82.51 ± 12.21 Lc(-1)d(-1) while households which rely on external sources was 36...
November 8, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29127641/technical-hygiene-economic-and-life-cycle-assessment-of-full-scale-moving-bed-biofilm-reactors-for-wastewater-treatment-in-india
#16
Anju Singh, Sheetal Jaisingh Kamble, Megha Sawant, Yogita Chakravarthy, Absar Kazmi, Enrique Aymerich, Markus Starkl, Makarand Ghangrekar, Ligy Philip
Moving bed biofilm reactor (MBBR) is a highly effective biological treatment process applied to treat both urban and industrial wastewaters in developing countries. The present study investigated the technical performance of ten full-scale MBBR systems located across India. The biochemical oxygen demand, chemical oxygen demand, total suspended solid, pathogens, and nutrient removal efficiencies were low as compared to the values claimed in literature. Plant 1 was considered for evaluation of environmental impacts using life cycle assessment approach...
November 10, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29127639/reactivation-and-reuse-of-tio2-sns2-composite-catalyst-for-solar-driven-water-treatment
#17
Marin Kovacic, Nina Kopcic, Hrvoje Kusic, Urska Lavrencic Stangar, Dionysios D Dionysiou, Ana Loncaric Bozic
One of the most important features of photocatalytic materials intended to be used for water treatment is their long-term stability. The study is focused on the application of thermal and chemical treatments for the reactivation of TiO2-SnS2 composite photocatalyst, prepared by hydrothermal synthesis and immobilized on the glass support using titania/silica binder. Such a catalytic system was applied in solar-driven treatment, solar/TiO2-SnS2/H2O2, for the purification of water contaminated with diclofenac (DCF)...
November 10, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29126025/metallurgical-residues-reused-as-filler-after-35years-and-their-natural-weathering-implications-in-a-mountain-area
#18
Leticia Gómez-Nubla, Julene Aramendia, Silvia Fdez-Ortiz de Vallejuelo, Juan Manuel Madariaga
The natural weathering of EAF (Electric Arc Furnace) and LF (Ladle Furnace) steel slag was evaluated through changes in the mineralogical and elemental composition. For that purpose, black steel slag and mixture of black and white steel slag were collected from two forest tracks, where they had been used as filler 19 and 35years ago respectively in a protected mountain area. Primary/original and secondary/degradation compounds were identified by spectroscopic techniques (Raman Spectroscopy, X-Ray Diffraction (XRD) and Scanning Electron Microscopy/Energy Dispersive X-Ray Spectroscopy (SEM/EDS))...
November 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29125696/detection-of-13-mycotoxins-in-feed-using-modified-quechers-with-dispersive-magnetic-materials-and-uhplc-ms-ms
#19
Mingrong Qian, Hua Yang, Zuguang Li, Yanping Liu, Jianmei Wang, Huizhen Wu, Xiaofeng Ji, Jie Xu
An analytical method for the simultaneous determination of 13 mycotoxins in feed by magnetic dispersive solid-phase extraction combined with ultra high performance liquid chromatography and tandem mass spectrometry was developed. The samples were extracted with acetonitrile/water (80:20, v/v, containing 3% acetic acid), and separated by centrifugation after salting-out, and then treated with magnetic adsorbents to remove interferences. The separation of target mycotoxins was performed on an ACQUITY UPLC HSS T3 column using a mobile phase consisting of 1 mmol/L ammonium acetate with 0...
November 10, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/29121616/loading-cu-doped-magnesium-oxide-onto-surface-of-magnetic-nanoparticles-to-prepare-magnetic-disinfectant-with-enhanced-antibacterial-activity
#20
Xiaole Zhang, Weijie Wang, Yijiang Zhang, Tao Zeng, Changhong Jia, Lixin Chang
In this article, Cu-doped magnesium oxide was loaded onto the surface of Fe3O4 magnetic nanoparticles via a hydrophilic carbon intermediate layer to synthesize Fe3O4@C@MgO-Cu magnetic composite. The potential application as disinfectant in water purification was investigated by examining the antibacterial activity of the Fe3O4@C@MgO-Cu composite toward Gram negative Escherichia coli and Gram positive Staphylococcus aureus. The practical bactericidal efficiency in inactivation experiment was also studied and the copper doping amount was optimized...
November 3, 2017: Colloids and Surfaces. B, Biointerfaces
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